Hydraulic boring device



Feb. 21, 1928.

W. S. MALLOY ET AL HYDRAULIC BORING DEVICE Filed Oct. 22. 1924 2 Sheets-Sheet 1 INVENIORS 517% my Y RAY ATTORNEY Feb. 21, 1928.

W. S. MALLOY ET AL HYDRAULIC BORING DEVICE Filed Oct. 22, 1924 2 Sheets-Sheet 2 HIV W Patented Feb. 21, 1928.

nnrrsn STATES insane PATENT OFFICE.

W'ESLEY S. MALLOY, OF OAKLAND, AND RAY J. LYMALI, OF BERKELEY, CALIFORNIA.

HYDRAULIC BORING DEVICE.

Application filed October 22, 1924. Serial No. 745,122.

Our invention relates to a hydraulic device for boring a hole through hard packed earth, or the like.

An object ofthe invention is to provide a device of the character described which is particularly adapt-edto have the fluid flow therefrom controlled at the nozzle thereof.

Another object of the invention is to provide a device of the character described in 0 which control of the fluid flow may be effected by pressure of the device against the material to be removed.

The invention possesses other objects and features of advantage. some of which, with .15 the foregoing, will be set forth in the following description of the preferred form of our invention which is illustrated in the drawings accompanying and forming part of the specification. It is to be understood that we do not limit ourselves to the showing made by the said drawings and description,

as we may adopt variations of the preferred form within the scope of our invention as set forth in the claims.

Referring to said drawings Figure 1 is an assembly view partly 1n section showing one embodiment of the device operatively attached to .asource of liquid.

Figure 2 is an enlarged sectional view of a portion of the embodiment shown in Figure 1 showing the nozzle and 1ts mounting.

Figure 3 is a sectional view showning another embodiment of the nozzle. its mounting, and a control valve for the former;

Figure 4 is a sectional view showing still another modified form of the nozzle and its mounting provided with a manually operable control valve. I

Figures 5 and 6 are sectional views showing modifications of the embodimentshown in Figure 3.

Briefly expressed, the device of 'our invention comprises a nozzle and mounting therefor, a maximum pressure control valve attached at a source of fluid under pressure, and connecting means between said valve and nozzle. The nozzle is provided with a self contained normally closed valvepreferably operable upon pressure of the nozzle against the material to be removed. To save the nozzle and connecting means from the effects of excessive pressures, the control valve is arranged to close when an excess pressure arises in the nozzle or connection so that excessive pressure therein -will be avoided. The device is used by pressing the nozzle against the material to be removed to start a stream of water against such material, and then pressing the device forward into theresulting hole as fast as may be possible or desirable to continue the water In the embodiment shown'in Figures 1 and 2, a nozzle holding block 7 is provided, having a nozzle 8 slidably mounted in a bore 9 provided in the nozzle block. The nozzle 8 is tubular in form, is provided at its upper end with a disc valve 11. and has transverse perforations 12 formed in its upper portion adjacent the end. The valve 11 is arranged to seat on the upper .end 1a of the block 7, the latter being provided with a cylindrical recess 16 opening in said end and surrounding the adjacent nozzle portion. It will now be noted that when the valve 11 is unseated, liquid may flow through the recess 16 and perforations 12 to the nozzlewhereaswhen the Valve 11 is. seated the flow of liquid is prevented. Actuation of the valve is arranged to beefiected upon relativemovement of the block 7 and-nozzle 8, the valve being normally held closed by the water pressure. Movement to open the valve is here shown provided for by. means of pres- I sure of the nozzle endv 17 against the material to be removed, so that the flow of water is thus controllable at the point of application.

Connection of the nozzle and block to a source of liquid under pressure is here shown affected by means of an elbow member 18 arranged to receive the block 7 at one end and to be attached at the other end toa flexible hose 19 by means of the hose coupling 21 of the usual type. The other end 22 of the hose 19 is arranged to be connected to a source of fluid such as the faucet 23 here shown. Inorder to prevent undue pressures being exerted in the hose and nozzle, an automatic pressure control mechanism 24 is preferably inserted between the hose end 22 and faucet 23. Int-he presentembodiment the pressure control mechanism 24 comprises a valve 26 normally held unseated in the path of the liquid therethrough by means of a spring 27. 05 In case of stoppage of the How through the nozzle 8 or any other cause for the creation ofan excess pressure on the valve 26, the valve 26 will close and thus protect the hose and nozzle from the possibly destructive effects of such pressure.

It will be noted that the nozzle end 17 is preferably cut bevelled, so that water escaping therethrough may be less easily blocked by contact of the end with the material to be removed. To limit the relative movement of the nozzle and block, cooperating stops and 25 are provided in the lower end 01 the block and on the outer portion or the nozzle respectively. By forming the stops 25 and 25 as an annular seat and valve respectively, leakage of liquid along the nozzle when the valve is wide open is positively prevented.

In the embodiment of Figure 3, the nozzle 31 is held in threaded engagement with'the nozzle block 32, the latter being in the form of an elbow, and a piece of pipe 33 is connected between the block 32 and hose coupling 34. Control of iiuid flow through the nozzle is here shown provided i'or'by means oi a valve 35 seated in and adjacent the end of the nozzle 31 and having a stem 36 normally extending forwardly thereof and of the nozzle. Unseating of the valve 35 may be read ily effected by pressing the stem 36 against the material to be removed; I

In the embodiment of Figure 4, the nozzle block 41 is provided with a valve 42 arranged to be normally held closed by means of the water pressure. The valve 42 is adapted to be opened by manual pressure directed against the valve stem 43 of the valve, the

latter being provided with a suitable gland 44 and packing 45 where it emerges from the block 41. As in the previously described em bodiments, a portion of the device is arranged to extend transversely of the nozzle, thus facilitating the handling of the device and the exertion of a pressure longitudinally of the nozzle during the boring process. I

s here shown, the portion of the block 41. containing the valve extends transversely of the nozzle and is arranged to receive the hose coupling 46 at its end.

In the embodiment of Figure 5, a straight nozzle block 51 is threaded to receive a nozzle 52 at one end and a pipe 53 at the other end in colinear relation with the nozzle. A valve 54 is arranged to seat on the inner end of the nozzle and is provided with a stem 55 extending through and protruding from the nozzle when the valve is seated. To insure proper seating of the valve, guide vanes 56 are provided on the outer end of the valve stem. This embodiment, it will be noted, is particularly adapted to be attached to the end of a pipe or hose for movementinto and through a boring. It will be noted that the nozzle 52 lies entirely within the block The construction of the embodiment shown in Figure 6 is similar to that shown in Fig- 'ure 5, except that the nozzle 62 and valve.

invention as being adapted for boring holes, it s obvious that the device may be used for injecting a solution into the ground.

Ne claim V 1. A hydraulic boringjdevice comprising a nozzle having a passage therethrough, means connecting said passagewith a source or liquid under pressure, a valve interposed in said nozzle passage and arranged to be normally held closed by said pressure, and means associated with said nozzle engageable with the material to be removed to effeet the opening of said valve during the engagement of said means with said material.

2. Ahydraulic boring device comprising a nozzle, block arranged to be attached to a source of liquid under pressure, a nozzle mounted in and'extending from said block and having a fluid passage therethrou gh, and means in said passage operable in accordance with the contactual relation of said-nozzle to the material to be removed for controlling the flow of liquid through the nozzle against said material. V

.3. A hydraulic boring device arranged for attachment to a source of fluid, comprising a nozzle havinga fluid passage extend ing theret-hrough, a valve arranged to normally close said passage, and means arranged at the discharge end-0t saidnozzle whereby said valve may-be opened by the application of pressure against said means.

4. A hydraulic boring device comprising a nozzle having a fluid passage arranged therein, a valve operatively disposed in said nozzle passage and arranged to normally close said passage, and means on said nozzle Wherebysaid valve may be automatically opened by and upon an appropriate projection of said means against the material to be removed. i v y p In testimony whereof, we have hereunto set our hands at Oakland, California, this 16th day of October, 1924. 

